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Full text of "The Cambridge Natural History"

AARD VARK                                     I 8/

This group contains but one family, the Orycteropoctidae, of
which there is but a single genus.

The Aard "Vark (earth-pig), genus Orycteropiis, is characterised
by its heavy build, the body being covered by rather coarse and
not very abundant hair; the snout is long and pig-like, with round
nostrils at its end; the ears are long, erect, and pointed; the
tail is very thick at first, so that it has been aptly described as
" a tapering of the body to a point." The fore-limbs are four-toed,
the hind five-toed.

FIG. 107.—Aard "Vark, or Cape Anteater.     Oryct&r&pus capensis,    x-^j.
In the skull there is a complete though slender zygoma; the
premaxillaries, though small, are not so rudimentary as in the
American Edentates. The annular tympanic is not ankylosed to
the surrounding bones, a character found in other low mammals.
Contrary to what is found in Manis, Orycteropus has a huge
lachrymal. There are thirteen dorsal and seven lumbar vertebrae.
The clavicle is well developed. Qrycteropus is peculiar among
Edentates in that the ischia do not unite with the vertebral
column. The femur has a third trochanter.
As mentioned on p. 162, the Aard Vark is diphyodont like normal
mammals. The permanent teeth consist of five molars and pre-
molars on each side of each jaw; the first two of these are pre-
molars, and are simpler in their form- than the succeeding two
teeth, which are partly divided by a median furrow into two
halves. These teeth are also peculiar in that they consist entirely
of vaso-dentine. They have been compared in minute structure
to those of the Kay Myliobates. According to Mr. OldHeld